2. EQUIPMENTS AND MATERIALS

3. Power Supply

4. Multimeter

5. 555 I.C

6. 0.01uF, 2.2uF

7. 10kΩ, 220kΩ

9. Remove R1 and adjust to 1MΩ, then re-insert R1.

10. Test by momentarily closing S1. The LED should come on for a few seconds.

11. Repeat step three several times to determine an average time that the LED is on (use a time piece).

12. Repeat step 2 until 4 by adjusting R1 to 2MΩ, 3MΩ, 4MΩ and 5MΩ. Fill table 1.

14. Draw the waveform for Voutput, Vcapacitor1, and Vtrigger.